Nuclear moments and charge radii of argon isotopes between the neutron-shell closures and

Blaum, Klaus; Geithner, W.; Lassen, J.; Lievens, Peter; Marinova, K. P.; Neugart, R.

doi:10.1016/j.nuclphysa.2007.11.004

Cited by 58 publications

(66 citation statements)

References 43 publications

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“…The leading terms in Eqs. (16) and (17) are independent of this sign assumption. However, by including α, α 2 , and α 3 terms, the picture can change to some extent, if mainly surface vibrations or oblate deformations are responsible for the B(E2) values.…”

Section: B Droplet Model Nuclear Charge Radii Of Neon Isotopesmentioning

confidence: 95%

“…The experimental apparatus, procedure, and detection technique have already been described in our previous papers [8,12,16] (see Fig. 2).…”

Section: A Experimental Setupmentioning

confidence: 99%

“…This nucleus is specified as a good rotor with large quadrupole deformation. The 20 Ne ground state is associated with a dominant cluster structure of a 16 O core plus an α particle [9,41,42]. Within this model it is obvious that the α particle outside the spherical core gives rise to an intrinsically deformed charge distribution.…”

Section: Even-even Neon Isotopesmentioning

confidence: 99%

“…Relative to 18 Ne, the radii of 19−22 Ne are again larger but decrease with increasing neutron number. This is from cluster configurations of the nucleons outside the doubly magic 16 O core, which in the simplest case of 20 Ne form just an α cluster. These configurations are related to the known deformation decreasing toward 24 Ne.…”

Section: Theoretical Modelsmentioning

confidence: 99%

“…These configurations are related to the known deformation decreasing toward 24 Ne. Calculations beyond 22 Ne are not envisaged at the moment because of a very long computational time increasing with the number of nucleons and possible cluster components outside the 16 O core.…”

Section: Theoretical Modelsmentioning

confidence: 99%

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Charge radii of neon isotopes across thesdneutron shell

et al. 2011

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We report on the changes in mean square charge radii of unstable neon nuclei relative to the stable 20 Ne, based on the measurement of optical isotope shifts. The studies were carried out using collinear laser spectroscopy on a fast beam of neutral neon atoms. High sensitivity on short-lived isotopes was achieved thanks to nonoptical detection based on optical pumping and state-selective collisional ionization, which was complemented by an accurate determination of the beam kinetic energy. The new results provide information on the structural changes in the sequence of neon isotopes all across the neutron sd shell, ranging from the proton drip line nucleus and halo candidate 17 Ne up to the neutron-rich 28 Ne in the vicinity of the "island of inversion." Within this range the charge radius is smallest for 24 Ne with N = 14 corresponding to the closure of the neutron d 5/2 shell, while it increases toward both neutron shell closures, N = 8 and N = 20. The general trend of the charge radii correlates well with the deformation effects which are known to be large for several neon isotopes. In the neutron-deficient isotopes, structural changes arise from the onset of proton-halo formation for 17 Ne, shell closure in 18 Ne, and clustering effects in 20,21 Ne. On the neutron-rich side the transition to the island of inversion plays an important role, with the radii in the upper part of the sd shell confirming the weakening of the N = 20 magic number. The results add new information to the radii systematics of light nuclei where data are scarce because of the small contribution of nuclear-size effects to the isotope shifts which are dominated by the finite-mass effect.

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Section: B Droplet Model Nuclear Charge Radii Of Neon Isotopesmentioning

confidence: 95%

“…The experimental apparatus, procedure, and detection technique have already been described in our previous papers [8,12,16] (see Fig. 2).…”

Section: A Experimental Setupmentioning

confidence: 99%